<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>博客登录界面</title>
    <style>
        .login{
            position: fixed;
            top:0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(45deg,#999 0%,#111 100%);
        }
        .container{
            position: fixed;
            max-width: 500px;
            min-width: 260px;
            width: 90vw;
            height: 350px;
            top:0;
            left: 0;
            bottom:0;
            right: 0;
            margin: auto;
            border: 1px solid #444;
            background-color: rgba(0,0,0,.2);
            box-shadow: 0 0 5px #F5F7FA;
            border-radius: 10px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
        }
        .input-value{
            outline: none;
            width: 200px;
            margin: 20px 0;
            line-height: 25px;
            text-indent: 1em;
            color: #fff;
            background-color: transparent;
            border: 1px solid #fff;
            border-radius: 5px;
        }
        .input-value:focus{
            border: 1px solid #fff;
        }
        .btn{
            outline: none;
            width: 200px;
            margin: 20px 0;
            line-height: 25px;
            border: 1px solid #fff;
            background-color: transparent;
            color:#fff;
            transition: .5s;
        }
        .btn:hover{
            cursor: pointer;
            background-color: #fff;
            color:#000;
        }
    </style>
</head>
<body>
<div class="login">
    <div class="container">
        <input type="text" placeholder="账号"  class="input-value"/>
        <input type="password"  placeholder="密码" class="input-value"/>
        <button  class="btn">登录</button>
    </div>
</div>
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
</body>
</html>